使用EditText更改另一个活动(backoffice)的TextView值

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="vertical"
    android:padding="16dp"
    tools:context=".MainActivity">

    <EditText
        android:id="@+id/editText"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:hint="请输入要传递的值" />

    <Button
        android:id="@+id/button"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="提交" />

</LinearLayout>

public class MainActivity extends AppCompatActivity {

    private EditText editText;
    private Button button;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        editText = findViewById(R.id.editText);
        button = findViewById(R.id.button);

        button.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                String inputText = editText.getText().toString();

                Intent intent = new Intent(MainActivity.this, BackofficeActivity.class);
                intent.putExtra("inputText", inputText);
                startActivity(intent);
            }
        });
    }
}

public class BackofficeActivity extends AppCompatActivity {

    private TextView textView;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_backoffice);

        textView = findViewById(R.id.textView);

        Intent intent = getIntent();
        String inputText = intent.getStringExtra("inputText");

        textView.setText(inputText);
    }
}